材料科学
反应性(心理学)
锂(药物)
四方晶系
插层(化学)
氧化还原
电极
石墨
单排替反应
磁滞
离子
化学工程
无机化学
纳米技术
物理化学
结晶学
冶金
晶体结构
化学
有机化学
凝聚态物理
医学
替代医学
物理
病理
工程类
内分泌学
作者
Anshuman Chaupatnaik,Artem M. Abakumov,Gwënaelle Rousse,Jean‐Marie Tarascon
标识
DOI:10.1016/j.ensm.2023.103042
摘要
Tetragonal layered “1111-type” oxychalcogenides can exhibit rich intercalation chemistry very much like the layered electrode materials in Li-ion batteries such as LiCoO2 or graphite. This opens up a possibility to design new high energy density positive electrode materials that combine key advantages of anionic redox such as high voltage operation and low voltage hysteresis observed in layered Li-rich oxides and Li-rich sulfides, respectively, that motivated our earlier study on Cu-based oxychalcogenides. As a natural step forward, in this work we explore the layered Ag-oxychalcogenides AgLaOS and AgBiOX (X = S/Se) with a particular focus on the topotactic reduction reactions occuring both during their synthesis and reaction with lithium. We synthesized AgLaOS and AgBiOX by adding Ag to LaOS* and BiOX*. We show that lithiation of AgLaOS progresses via Li-Ag displacement-alloying, while lithium addition to the Bi-based oxychalcogenides results in displacement-conversion-alloying for AgBiOS compared to multiphasic reaction-conversion-alloying in case of AgBiOSe. We further compare the lithium reactivity of these Ag-based compounds to related oxychalcogemnides with or without Cu rationalizing the differences with theoretical calculations. Overall, through this work we project the diverse topochemical reactivity of layered Ag-based oxychalcogenides.
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